1. When bicycle tube is punctured than:

2. We are not crushed under the weight of air because:

3. The non-contact force is:

4. A boat comes to rest if we stop rowing it due to:

5. A football moves when we:

6. Which of the following is contact force:

7. The non-contact force is:

8. Pressure =

9. Knives, needles, saws are made sharp or pointed to:

10. The pressure with the height of the liquid column.